Pathology is a science of studying diseases, especially concentrating on the structural and functional changes in tissues & organs of the body caused by diseases. This course is divided into 2 pars. Part 1. General Pathology: describes the general principles of diseases & the disorders the affect the body as a whole. Part 2. Systemic Pathology : concentrates on diseases of individual organs. The objectives have been to describe important mechanism of diseases and morphological changes in considerable detail in order to establish the basic concepts of diseases for further studies of clinical courses.